NetMath tools
7 tools that run in your browser. Nothing to install, nothing uploaded.
- CIDR to IP RangeExpand any CIDR block into its network, broadcast and usable host range.
- HTTP Status Code ReferenceLook up any HTTP status code — what it means and when you actually see it.
- IP to Decimal / Hex / BinaryConvert an IPv4 address to its integer, hex and binary forms, and back.
- MAC Vendor (OUI) LookupFormat any MAC address and read the properties encoded in it.
- Port Number ReferenceLook up what service uses a port — and which ports should never face the internet.
- Subnet Mask to CIDRConvert between prefix length and subnet mask, with host counts.
- Wildcard Mask CalculatorConvert between a subnet mask and the wildcard mask Cisco ACLs use.